\documentclass{ctexart}
\usepackage{graphicx}
\usepackage{amsmath}

\title{chapter 2 Programming assignments}


\author{戚宇航  \\ 信息与计算科学 3200104567}

\begin{document}
\maketitle

\begin{figure}[htbp]
  \centering
  \includegraphics{B.png}
  \caption{B}
\end{figure}


\begin{figure}[htbp]
  \centering
  \includegraphics{C.png}
  \caption{C}
\end{figure}


\begin{figure}[htbp]
  \centering
  \includegraphics{D.png}
  \caption{D}
\end{figure}

\begin{figure}[htbp]
  \centering
  \includegraphics{D_2.png}
  \caption{D}
\end{figure}

$k=1$代表超速了

\begin{figure}[htbp]
  \centering
  \includegraphics{E.png}
  \caption{E}
\end{figure}
都会活
\end{document}
